GIVEN GRAPH AREA/Z-SCORE 1. to the left of z=1.68 2. to the right of z=-2.54 3. between z=-0.76 and z=0.94
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- The average percent defective product of a manufacturing plant is 1.20%. On a particular day 50 pieces were rejected out of a total daily production of 2730 pieces. What is the percent increase of defective pieces for the day above the average percent defective? Round the answer to 2 decimal places.Estimate the age of a newly discovered fossil for which the ratio of carbon-14 to carbon-12 is R=1/1014.Find the z-score that cuts off 35% in the tail on the right. (Hint: if you can’t find that EXACT percentage on the table, then there should be two VERY CLOSE numbers, one just under the percentage you’re looking for, and one just over it. Either one of those two is fine—so just pick the one that appears in the answer options below). Group of answer choices
- Find the z-score that cuts off 15% in the tail on the right. (Hint: if you can’t find that EXACT percentage on the table, then there should be two VERY CLOSE numbers, one just under the percentage you’re looking for, and one just over it. Either one of those two is fine—so just pick the one that appears in the answer options below).On a scale of 0 to 10, the student rated her enjoyment of stats as an 8. The average rating among students is 5, and the average spread around that mean is 1.5. I got the z score as 2.0. Can you kindly help with these questions below? What percent of college students enjoy statistics more? What percent of college students enjoy statistics less?On a scale of 0 to 10, a college student rated her enjoyment of statistics as a 7. The average rating among college students is 5 and the average spread around that mean is 1.5. What is the z-score for this student’s raw score of 7?Please include the formula and calculations in your answer to this question. What percent of college students enjoy statistics more? What percent of college students enjoy statistics less? Explain how you solved these.
- Mean of SAT-math score of population : 517 SD of the SAT-math score: 100 I want to know the score that marks the 10th percentile. (Round off to three decimal places if necessary.You are doing a problem where you have a negative z-score, and you have to look up the proportion of the shaded area in the tail beyond that z-score; in other words, you are shading to the left from your z-score, and looking for the proportion that you shaded. Four “proportions” are given below. Which one is the ONLY one that could potentially be the number you are looking for? (Hint: Think about what you know about proportions: What kind of number are they? And what things can they represent?) p = 0.6500 p = 1.0015 p = 0.3100 p = -0.0500You are doing a problem where you have a negative z-score, and you have to look up the proportion of the shaded area in the tail beyond that z-score; in other words, you are shading to the left from your z-score, and looking for the proportion that you shaded. Four “proportions” are given below. Which one is the ONLY one that could potentially be the number you are looking for? (Hint: Think about what you know about proportions: What kind of number are they? And what things can they represent?) Group of answer choices p = 0.5454 p = 0.4500 p = 1.0150 p = -0.2500
- An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step 1 of 2 : Suppose a sample of 669669 tankers is drawn. Of these ships, 194194 had spills. Using the data, estimate the proportion of oil tankers that had spills. Enter your answer as a fraction or a decimal number rounded to three decimal places.Select the correct statement below a) If the nineteenth percentile has a value of 0.8, this means that 90% of all observations have a value lower than 0.8 b)If the nineteenth percentile has a value of 0.8, this means that 80 percent of all observations are below 90 percent. c) If the nineteenth percentile has a value of 0.8, this means that 90% of all observations have a value higher than 0.8 d) If the nineteenth percentile has a value of 0.8, this means that 80 percent of all observations are over 90 percent.CANNOT USE EXCEL DO BY HAND A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back pain. Prior to testing the patch, each of n = 8 patients rates the current level of back pain on a scale from 1 to 10. After wearing the patch for 90 minutes, a second pain rating is recorded. The data are as follows: Before After 6 2 8 3 9 4 8 1 10 2 5 3 9 8 7 7 Do the results indicate a significant difference? Use a two-tailed test with α=.05 compute cohens d to measure the size of the effect
